* disable_email_validation (Boolean) - Disables the check if a mail address is in a valid format and can be resolved via DNS.
* disable_url_validation (Boolean) - Disables the DNS lookup of an URL.
* event_input_format - Default value is "ymd".
+* frontend_worker (Boolean) - Activates the frontend worker which acts as a replacement for running the poller via the command line.
+* frontend_worker_timeout - Value in minutes after we think that a frontend task was killed by the webserver. Default value is 10.
* ignore_cache (Boolean) - For development only. Disables the item cache.
* like_no_comment (Boolean) - Don't update the "commented" value of an item when it is liked.
* local_block (Boolean) - Used in conjunction with "block_public".